Robert Griffin III's knee buckled as he tried to field a bad shotgun snap late in the game, the pain so bad that he didn't even try to recover the ball.

And the latest debate over the wisdom of keeping an injured franchise player on the field—when he's obviously nowhere near his best—starts with Redskins coach Mike Shanahan, who let Griffin keep going until the QB could absolutely go no more.

"I think I did put myself at more risk," Griffin said. "But every time you get on the field, you're putting yourself on the line."

Griffin was headed for an MRI exam to determine the extent of the damage on his re-injured right knee. He was already playing with a big black brace, having sprained the lateral collateral ligament about a month ago against the Baltimore Ravens. He hadn't looked his usual self in the two games he had played since, and he was obviously hobbled after falling awkwardly while throwing an incomplete pass in the first quarter Sunday.

In the fourth quarter, Griffin labored on a 9-yard run that made him look 32 years old instead of 22.

"He said, 'Hey, trust me. I want to be in there, and I deserve to be in there,'" Shanahan said. "I couldn't disagree with him."

Shanahan said he'll probably second-guess himself over his decision. He has the entire offseason to do so. And, whatever the injury, Griffin at least has time to recover.